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Single-step nanoengineering of silica coated maghemite hollow spheres with tunable magnetic properties

AuthorsTartaj, Pedro ; González-Carreño, T. ; Serna Pereda, Carlos J.
Issue Date2001
CitationAdvanced Materials 13 (21): 1620-1624 (2001)
AbstractTunable magnetic hollow spheres of γ-Fe2O3 with a silica-enriched surface layer have been synthesized by aerosol pyrolysis of an iron ammonium citrate/TEOS solution in methanol. Careful temperature control is crucial for an optimum yield of intact spheres. The Figure shows a TEM image of a sphere, revealing the outer layer consisting mainly of silica. The material is potentially interesting for magnetic-fluid applications, e.g., in medicine.
Identifiersissn: 0935-9648
Appears in Collections:(ICMM) Artículos
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